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Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy

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Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy

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Author: Dial, O.; Ashoori, R.; Pfeiffer, L.; West, K.
Department: Massachusetts Institute of Technology. Department of Physics
Publisher: American Physical Society
Date Issued: 2012-02
Abstract:
Calculations of the single-particle density of states (SPDOS) of electron liquids have long predicted that there exist two distinct charged excitations: the usual quasiparticle consisting of an electron or hole, and a plasmaron consisting of a hole resonantly bound to real plasmons in the Fermi sea. Using tunneling spectroscopy to measure the SPDOS of a 2D electronic system, we demonstrate the detection of a plasmaron in a 2D system in which electrons have mass. With the application of a magnetic field we discover unpredicted magnetoplasmarons which resemble Landau levels with a negative index.
URI: http://hdl.handle.net/1721.1/71271
ISSN: 1098-0121
1550-235X
Citation: Dial, O. et al. “Observations of Plasmarons in a Two-dimensional System: Tunneling Measurements Using Time-domain Capacitance Spectroscopy.” Physical Review B 85.8 (2012). ©2012 American Physical Society
Version: Final published version
Terms of Use: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Published As: http://dx.doi.org/10.1103/PhysRevB.85.081306
Journal: Physical Review B

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